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Date & Database & Calculation

Alexandru_mbmAlexandru_mbm Member Posts: 1
I have a real problem for the last 2 days...

I have a date stored in my MS Access DB as "ShortDate" (dd/MM/yyyy).

I need to read this date and compare it with "current date - X days". Where X days is a Value saved by the user (into another form 5, 30, 60 days... etc).

In the short way:


If "Current Date - 55 Days" it's equal OR in that interval of "DataBase Date" then MessageBox.Show("Warning!!! Expiring in {X} Days")

ElseIf "Current Date - 55 Days" it's greater than "DataBase Date" MessageBox.Show("It's expired.")

EndIf


For the moment i use this peice of code but it'n not worikg...

[code]
Dim data_curenta As Date = Date.Now
Dim data_curenta_formatata As Date = data_curenta.ToString("dd/MM/yyyy")
Public Shared valabilitate_cu, valabilitate_prcu, valabilitate_acd, valabilitate_pracd As String
Public Shared data_expirare_bzd_prcu_aditional As Date

..................................


Private Sub verificare_valabilitate_prcu()

Dim Conexiune As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & System.Windows.Forms.Application.StartupPath & "urb.mdb;Jet OLEDB:Database Password=XXXXXXX"
Dim cn As New OleDb.OleDbConnection(Conexiune)
Dim sql As String = "SELECT prelungire_data_expirare FROM cu WHERE prelungire_activa='1' AND prelungire_folosita='0'"
Dim cmd As New OleDb.OleDbCommand(sql, cn)
Dim dr As OleDb.OleDbDataReader

Try

cn.Open()
dr = cmd.ExecuteReader

While (dr.Read)

Dim data_expirare_bzd_prcu As Date = dr("prelungire_data_expirare")
Dim data_expirare_bzd_prcu_formatata As Date = data_expirare_bzd_prcu.ToString("dd/MM/yyyy")
data_expirare_bzd_prcu_aditional = data_expirare_bzd_prcu_formatata.AddDays(-valabilitate_prcu - 1).ToString("dd/MM/yyyy")

End While

cn.Close()

Catch ex As Exception

Me.TopMost = False
frm_eroare.lbl_numar_eroare.Text = Err.Number
frm_eroare.txt_detalii_eroare.Text = Me.Text & " (" & Me.Name & ")" & vbCrLf & vbCrLf & ex.Message & ex.StackTrace & " (" & Err.Source & "-" & Err.LastDllError & "-" & Err.Erl & ")"
frm_eroare.Show()

End Try

If (cn.State And ConnectionState.Open) <> 0 Then

cn.Close()

End If

'#####################################

Me.Cursor = Cursors.WaitCursor

Dim conn As OleDb.OleDbConnection
Dim data As DataTable
Dim Adapter As OleDb.OleDbDataAdapter
Dim CommandBuild As OleDb.OleDbCommandBuilder

Dim connStr As String
connStr = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & System.Windows.Forms.Application.StartupPath & "urb.mdb;Jet OLEDB:Database Password=XXXXXXX"
conn = New OleDb.OleDbConnection(connStr)

Try
conn.Open()

data = New DataTable
Adapter = New OleDb.OleDbDataAdapter("SELECT numar_certificat_2, data_certificat_2, nume_solicitant, prelungire_data_expirare FROM cu WHERE prelungire_data_expirare < " & data_expirare_bzd_prcu_aditional & " AND prelungire_activa='1' AND prelungire_folosita='0'".ToString, conn)
CommandBuild = New OleDb.OleDbCommandBuilder(Adapter)

Adapter.Fill(data)

Me.dgv_prcu.DataSource = data

Me.dgv_prcu.Columns(0).Width = 100
Me.dgv_prcu.Columns(1).Width = 100
Me.dgv_prcu.Columns(2).Width = 250
Me.dgv_prcu.Columns(3).Width = 100

Me.dgv_prcu.Columns(0).HeaderText = "Nr. document"
Me.dgv_prcu.Columns(1).HeaderText = "Din data"
Me.dgv_prcu.Columns(2).HeaderText = "Pe numele de"
Me.dgv_prcu.Columns(3).HeaderText = "Expira la"

Me.Cursor = Cursors.Default

conn.Close()

Catch ex As OleDb.OleDbException
MessageBox.Show("Eroare: " + ex.Message & "", "Eroare", MessageBoxButtons.OK, MessageBoxIcon.Error)
Me.Cursor = Cursors.Default
End Try

End Sub
[/code]

Thanks in advice!
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